Despite being only a year and a half old, the company already has two core task management products. 6wunderkinder said this week that Wunderlist has amassed two million users in the 15 months since launching, but so far they’re keeping schtum on uptake for the still-in-beta Wunderkit — a fuller project management platform that could have enterprise as well as consumer appeal.

Wunderlist’s adoption seems to be accelerating: six months ago, 6wunderkinder said the app had drawn a million users over nine months. Those are the sort of numbers that drew in $4.2 million of funding from Skype founder Niklas Zennström’s Atomico last November.

Part of the acceleration, however, may be down to the fact that the company has taken the app to more platforms. While it began as an iOS, PC, Mac and web-app affair, with an Android version built on the Titanium platform, it has since then expanded to Linux and BlackBerry while gaining a less-kludgy native Android iteration. A Windows Phone version is also on the horizon.

Announcing its second milestone earlier this week the company gave some stats for Wunderlist’s usage so far:

Eight million lists created

75 million tasks created

812 million syncs handled

‘App of the week’ in over 100 countries, with availability in 30 languages

But even though it’s now launched Wunderkit, 6wunderkinder says it won’t be abandoning its previous app. In a cute ‘love letter’ to its first app on Tuesday, 6wunderkinder stressed that Wunderlist may have lacked attention during the first weeks of Wunderkit’s existence, but the older child would not be left behind.

“You’ve probably been asking yourself: why is my sync not quite as reliable as it used to be? Why does Wunderkit get recurring tasks? We’d like to reaffirm our commitment to you. Over the coming year we’re going to make sure you get the attention you deserve. We’ll be rebuilding you from the ground up, making sure that you run faster, lighter and better than you ever have before. We’ll even be able to get you those new features you’ve been dying to have.”

As for how it intends to make money? Well, 6wunderkinder posted an interesting update last week. The original plan was to have a paid version of the service, at $4.99 a month, which would have been needed if the user wanted to collaborate with people outside of their own ‘workspace’.

But users responded by saying the platform’s adoption would probably be hindered by crippling its collaborative nature, and 6wunderkinder changed its mind and de-limited the free version. The $4.99-per-month Pro scheme still stands, but it’s now targeting heavy users who might want increased storage, for example.

6wunderkinder told GigaOM that Wunderlist saw a brief spike in takeup after Wunderkit went into public beta. The company has not disclosed Wunderkit’s adoption figures yet, but it did say 140,000 people had joined the waiting list for that beta, and it expected Wunderkit to hit the million-user mark as quickly — if not faster — than Wunderlist did.

Don’t get mad at me for not finding seven stories for you to read this weekend. I have been busy with some other stuff and as a result I have not been able to spend as much time reading as I normally do. Regardless, here is an abbreviated recommendation list. Hope you enjoy them.

Silence versus communication: A productivity experiment from one of my favorite new companies, 6Wunderkinder, is a must read for those who want to get more from their day.

Publishers are flubbing the iPad. No doubt, for all they are doing is repurposing the old magazines onto the iPad instead of thinking about magical experiences that leverage the iPad and its sensors.